EPAM Systems Associate Software Engineer Interview Questions and Answers

Basically communication and sql 12 question and progaming mcq 12q and 2 coding question

Q1. Tell me about your self
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Q2. Project explanition
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Q3. What is inheritance
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits attributes and methods from another class.
• Allows a class to inherit properties and behaviors from another class

• Promotes code reusability and reduces redundancy

• Derived class can add its own unique attributes and methods

• Example: Class 'Car' can inherit from class 'Vehicle' and gain attributes like 'color' and methods like 'drive'
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Q4. Code in inheritance
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Inheritance in object-oriented programming allows a class to inherit properties and behaviors from another class.
• Inheritance allows for code reusability and promotes a hierarchical structure in classes.

• Subclasses can access and modify the properties and methods of their parent class.

• Example: class Animal { ... } class Dog extends Animal { ... }

• Example: class Shape { ... } class Circle extends Shape { ... }
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Q5. Code reverse a string
Ans. 
Reverse a string using array manipulation
• Create an array of characters from the input string

• Iterate through the array in reverse order and append each character to a new string

• Return the reversed string
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Q6. Sql query for seleting a particular column from a table and give the employer count
Ans. 
Use SQL query to select a particular column from a table and get the count of entries.
• Use SELECT statement to specify the column you want to retrieve.

• Use COUNT() function to get the count of entries in that column.

• Combine both in a single query to achieve the desired result.
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Q7. Apptitute question a sales man sells a item for 20% discount from its original price for some time and he want to sell the remaing item for original price what he needs to do??
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Q8. A clock tick 8 times on 8'o clock the time taken between 1st tick and last tick is 35 sec what is the time taken for starting tick and end tick at 11'o colck
Ans. 
The time taken for the clock to tick from 8'o clock to 11'o clock is 105 seconds.
• Each tick represents 1/8th of an hour (45 minutes) on the clock.

• From 8'o clock to 11'o clock, there are 3 hours, so the total time taken is 3 * 45 = 135 minutes = 135 * 60 = 8100 seconds.

• The time taken for the clock to tick from 8'o clock to 11'o clock is 8100 - 35 = 8065 seconds.
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Whole topics on aptitude randolly

Topics realted to funtions and loops

Q1. How will you approach a problem which you are completely unaware of
Ans. 
I would start by breaking down the problem, researching similar problems, seeking help from colleagues, and experimenting with different solutions.
• Break down the problem into smaller components to understand it better

• Research similar problems online or in relevant literature

• Seek help from colleagues or mentors who may have experience with similar problems

• Experiment with different solutions to see what works best
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40 questions-aptitude test followed by a technical test comprising 10 questions.

Q1. Add two linked list minimum cost path print all the nodes in a tree except the leaf nodes.
Ans. 
The question asks for adding two linked lists, finding the minimum cost path, and printing all nodes in a tree except the leaf nodes.
• To add two linked lists, traverse both lists simultaneously and add corresponding nodes.

• To find the minimum cost path, use algorithms like Dijkstra's or A*.

• To print all nodes in a tree except the leaf nodes, perform a depth-first traversal and print non-leaf nodes.
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Q1. Mix of hr + technical questions. Didn't ask much deep in technical questions.
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The questions were easy but the platform is not taking user inputs.

They are very advanced aptitude questions and some logical reasoning questions too.

Q1. Features of oops and method overloading
Ans. 
OOPs features include encapsulation, inheritance, polymorphism, and abstraction. Method overloading allows multiple methods with the same name but different parameters.
• OOPs features: encapsulation, inheritance, polymorphism, abstraction

• Method overloading: multiple methods with same name but different parameters

• Example: void print(int a), void print(int a, int b)
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Q2. Sql related queries and joins in sql
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Q1. Find minimum positive value in array.
Ans. 
Find minimum positive value in array of strings.
• Convert array elements to integers

• Filter out negative values

• Find minimum positive value
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Q2. One question was on String, they were asking some different scenario on string based question.
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Q1. It was more focus on multi threading.. different way to create thread.. what is thread pool?
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Q2. One array problem, to return the index of the array where the both the sides(from start and from end) sum is equal.
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